Dibenzyl cyanamide as an insecticide



Patented No 3, 1942 2,300,588 DIBENZYL CYANAMIDE AS AN INSECTICIDE William Moore, Stamford, Conn., assignor to American Cyanamid Company, New York, N. Y., a corporation of Maine No Drawing. Application June 7, 1940,

Serial No. 339,272

Claims. (01. 167-30) The present invention relates to an insecticide and more particularly to a compound which is especially efiective as a contact poison for the control of insect pests.

I have discovered that dibenzyl cyanamide possesses strong insecticidal activity against sucking and soft-bodied insects which ar particularly difllcult to exterminate, for example, the bean aphid and the citrus'red spider, and that such activity is attained without any substantial harmful or detrimental action on the vegetation infested with the insect.

The following example illustrates a specific method of preparing the above compound in accordance with the invention. Materials employed are in parts by weight.

Example 6.1 parts of cyanogen chloride were dissolved in 75 parts of heptane. After cooling the solution to 0-5 C., 19.7 parts of dibenzyl amine were gradually added with stirring. When this addition was completed, the mixture was agitated with a solution of 4 parts of sodium hydroxide dissolved in 20 partsof water, and allowed to stand on hour. The reaction mixture was washed with dilute hydrochloric acid and then ing table shows the kills obtained under comj parable conditions for the various dilutions when the sprays were applied to aphids and red spiders.

Table 1 A 100% kill of the red spider eggs is obtained in conjunction with the 100% kill 01 the active forms.

This new insecticide may be applied many of the conventional manners. it may be used in an aqueous emulsion or it may also be incorporated in organic, liquids such as the aliphatic and aromatic hydrocarbons for spraying purposes; It may be effectively used in dusts with such inert solid diluents as kieselguhr, wood flour, walnut shell, talc and the like.

While the invention has been described with particular reference to specific embodiments, it is to be understood that it is not to be limited thereto but is to be construed broadly and restricted solely by the scope of the appended claims.

What I claim is:

1. A horticultural insecticidal composition including dibenzyl cyanamide.

2. A horticultural insecticidal composition in cluding dibenzyl cyanamide incorporated in an organic liquid.

3. A horticultural insecticidal composition including dibenzyl cyanamide incorporated in a solvent medium consisting of acetone and 35% water.

4. A horticultural insecticidal composition in cluding dibenzyl cyanamide incorporated in an aqueous emulsion.

5. A horticultural insecticidal composition including dibenzyl cyanamide incorporated in. a dust selected from the group consisting of kiesel guhr, wood flour, walnut shell and talc.

. WILLIAM MOORE.

Thus, for example, 

